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Method for controlling the pressure dynamics and for estimating the life cycle of the combustion chamber of a gas turbineMethod for controlling the pressure dynamics and for estimating the life cycle of the combustion chamber of a gas turbine description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080294322, Method for controlling the pressure dynamics and for estimating the life cycle of the combustion chamber of a gas turbine. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates to a method for controlling the pressure dynamics and estimating the life cycle of the combustion chamber of a gas turbine. 2. Description of the Related Art The use of gas turbines, normally consisting of a multiphase compressor, in which the air sucked from the outside is compressed, a combustion chamber, in which the combustion takes place of gaseous fuel added to the compressed air, and a turbine or expander, in which the gases coming from the combustion chamber are expanded, is known for the production of electric energy. The turbine is then capable of generating mechanical energy which can be exploited for activating operating machines or for feeding electric generators. Current methods for controlling the pressure dynamics of the combustion chamber of a gas turbine envisage that a certain protection action only be exerted after stress, having a specific level of amplitude, has been verified for a certain period of time. Furthermore, only a limited number of critical amplitudes is taken into consideration, whereas the periods of time are established on the basis of estimations based on experience. The result obtained is that the action aimed at protecting the integrity of the combustion chamber and consequently of the turbine, is only exerted beyond a certain fatigue threshold, whereas the fatigue life cycle of the components of the turbine itself can also terminate below this threshold. As is known, fatigue is a mechanical phenomenon whereby a material subjected to varying loads with time, either regularly or casually, is damaged to breakage, even if the maximum intensity of the loads in question is much lower than that of breakage or static yield of the material itself. An objective of the present invention is therefore to provide a method for controlling the pressure dynamics and for estimating the life cycle of the combustion chamber of a gas turbine, capable of establishing, on the basis of measurements of the pressure oscillations and using particular control and evaluation instruments, the admissible fatigue threshold for the same combustion chamber, allowing the due protection actions to be undertaken when excessive increases in pressure arise. A further objective of the invention is to provide a method for controlling the pressure dynamics and for estimating the life cycle of the combustion chamber of a gas turbine, in which it is possible, on the basis of the data obtained, to optimize the maintenance intervals on the components of the combustion chamber itself. BRIEF SUMMARY OF THE INVENTIONThese objectives according to the present invention are achieved by providing a method for controlling the pressure dynamics and for estimating the life cycle of the combustion chamber of a gas turbine. Further characteristics of the invention are indicated in the subsequent claims. BRIEF DESCRIPTION OF THE DRAWINGSThe characteristics and advantages of a method for controlling the pressure dynamics and for estimating the life cycle of the combustion chamber of a gas turbine according to the present invention will appear more evident from the following illustrative and non-limiting description, referring to the enclosed schematic drawings in which: FIG. 1 is a schematic illustration of a gas turbine in which it is possible to apply a method for controlling the pressure dynamics and for estimating the life cycle of the combustion chamber according to the present invention; FIG. 2 shows a diagram which relates a certain number of stress cycles measured with certain amplitude values; and FIG. 3 shows a comparison between the values of FIG. 2 and the function obtained by approximating these values by means of an exponential regression. Continue reading about Method for controlling the pressure dynamics and for estimating the life cycle of the combustion chamber of a gas turbine... Full patent description for Method for controlling the pressure dynamics and for estimating the life cycle of the combustion chamber of a gas turbine Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Method for controlling the pressure dynamics and for estimating the life cycle of the combustion chamber of a gas turbine patent application. Patent Applications in related categories: 20090292436 - Control of combined cycle power generation system - A control system for a combined cycle power generation system including a gas turbine engine (GT), a heat recovery steam generator (HRSG), and a steam turbine (ST) includes a display wherein an operator may observe information about predicted operating parameters; a user interface wherein an operator may provide additional operating ... 20090292437 - Systems and methods involving multiplexed engine control signals - Systems and methods involving multiplexed engine control signals are provided. In this regard, a representative engine control system for a gas turbine engine includes: a signal relay device operative to receive multiplexed signals from an engine electronic control (EEC), demultiplex the signals, and provide demultiplexed signals to corresponding ones of ... ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. 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